Stop motion device for knitting machines, particularly for straightbar knitting machines



Sept. 30, 1958 J. VACLAVIK ET AL 2,853,864

STOP MOTION DEVICE FOR KNITTING MACHINES, PARTICULARLY FOR STRAIGHT-BAR KNITTING MACHINES Filed OCT,- 5, 1954 16 Sheets-Sheet 1 Fig. 1a

I I I I I J O/Q I I CIV Bayer BY Sept. 30, 1958 STOP MOTION DEVICE FOR KNITTING MACHINES, PARTICULARLY Filed Oct. 5,

J. VA CLAVl K ET AL 2,853,864

FOR STRAIGHT-BAR KNITTING MACHINES l6 Sheets-Sheet 2 INVENTORS I Jaros/av' Wkc/arr/k Old/ ich Bayer 2,853,864 NES, PARTI CULARLY J. VACLAVIK ET AL E FOR KNITTING MACHI Sept. 30, 1958 STOP MOTION DEVIC FOR STRAIGHT-BAR KNITTING MACHINES 5, 1954 16 Sheets-Sheet 3 Filed 001:.

Fig. 1c

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STOP MOTION DEVICE FOR KNITTING MACHINES, PARTICULARLY FOR STRAIGHT-BAR KNITTING MACHINES Filed Oct. 5, 1954 v 16 Sheets-Sheet 5 167 16 5 Fig. 2a 768 INVENTORS JErros/azr Wc/d'y'fk O/qF/c/r Bdyef- I I Sept, 39, 1958 J. VACLAVIK ETAL 3, 4

STOP MOTION DEVICE FOR KNITTING MACHINES, PARTICULARLY FOR STRAIGHT-BAR KNITTING MACHINES Filed Oct. 5, 1954 7 1e Sheets-Sheet s Fig. 2b

INVENTORS,

O/oF/ch Bayer BY @KMZ Sept, 30, 1958 J. VA'CLAVIK ET AL STOP MOTION DEVICE FOR KNITTING MACHINES, PARTICULARLY. 1

FOR STRAIGHT-BAR KNITTING MACHINES Y Filed Oct. 5, 1954 1e Sheets-Sheet 7 F lg. 34

INVENTORS Jaras/azr Mic/q v/k UIOF/ch Baye an Sept. 30, 19.58 J. VACLAVlK ET AL 2,853,864

STOP MOTION mzvzcs FOR KNITTING MACHINES, PARTICULARLY FOR STRAIGHT-BAR KNITTING MACHINES Filed Oct, 5, 1954 16 Sheets-Sheet 8 INVENTORS fangs/avw'c/au/k O/qrv'c/z Bayer Sept. 30, 1958 J. VACLAVIK ET AL 2,853,864

STOP MOTION DEVICE FOR KNITTING MACHINES, PARTICULARLY FOR STRAIGHT-BAR KNITTING MACHINES I Filed Oct. 5, 1954 16 Sheets-Sheet 9 INVENTORS Jams/av Zfifc/mnk O/qr/ch Bayer I Sept. 30, 1958 J. VACLAVIK ET AL 2,353,864

STOP MOTION DEVICE FOR KNITTING MACHINES, PARTICULARLY FOR STRAIGHT-BAR KNITTING MACHINES l6 Sheets-Sheet 10 Filed Oct. 5, 1954 vvwv mm WW 4 2 M o n WM 7 w I Sept. 30, 1958 J. VACLAVIK ETAL 2,853,364 STOP MOTION navxcs FOR KNITTING MACHINES, PARTICULARLY FOR STRAIGHT-BAR KIIIT'IIIK; MACHINES Filed Oct. 5, 1.954 16 Sheets-Sheet '11 INVENTCRS T ros/av Vv'r/a I? O/aX/M f nyer BY MW W pt- 1958 J. VACLAVIK ETAL 2,853,364

STOP MOTION DEVICE FOR KNITTING MACHINES, PARTICULARLY FOR STRAIGHT-BAR KNITTING MACHINES Filed Oct. 5. 1954 16 Sheets-Sheet 12 x INVE'NTOR) ams/a2 $24M? Oldi /(6 Za a/- p 1958 J. VA CLAVl K ETAL 2,853,864

STOP MOTION DEVICE FOR KNITTING MACHINES, PARTICULARLY y FOR STRAIGHT-BAR KNITTING MACHINES Filed Oct. 5, 1954 l6 Sheets-Sheet 13 Fig. 12

INVENTORS Jams/av wc/awk O/d/Wbh Bayer Sept. 30, 1958 J. VACLAVIK ETAL 2, 5 6

STOP MOTION DEVICE FOR KNITTING MACHINES, PARTICULARLY FOR STRAIGHT-BAR KNITTING MACHINES l6 Sheets-Sheet 14 Filed Oct. 5. 1954 INVENTORS mw/X fa es/a 1/ if a/a hw 62 MM L/ VlK ET AL 2,853,864 STOP MOTION DEVICE FOR KNITTING MACHINES, PARTICULARLY FOR STRAIGHT-BAR KNITTING MACHINES Filed Oct. 5, 1954 I vJ. VACLA Sept. 30, 1958 16 Sheets-Sheet 15 m O, N 9 1%. a i Z M 7 wk M of d 5 l I Sept. 30, 1958 J. VACLAVIK ETAL 2,853,864

STOP MOTION DEVICE FOR KNITTING MACHINES, PARTICULARLY FOR STRAIGHT-BAR KNITTING MACHINES Filed Oct. 5, 1954 16 Sheets-Sheet 16 INVENTOR) fares/a v yak/710 f 0/4/52 6 United States Patent STOP MOTION DEVICE FOR KNITTING MA- CHINES, PARTICULARLY FOR STRAIGHT- BAR KNITTING MACHINES Jaroslav Vaclavik and Oldiich Bayer, Gottwaldov, Czechoslovakia, assignors to Zapadomoravske strojirny, narodni podnik, Trebic, Czechoslovakia Application October 5, 1954, Serial No. 513,831

Claims priority, application Czechoslovakia October 6, 1953 15 Claims. (Cl. 66-163) The present invention relates to a stop-motion for knitting machines, particularly straight-bar knitting machines, said stop-motion being so designed as to cause in the case of any incidental increase of the normal thread tension, underspooling, occurrence of slubs, breakage or absence of thread, an automatic displacement of the respective needle bar out of the range of the presser edge of the sinker head as well as the stoppage of the machine.

In a recently designed known arrangement of stopmotion devices on straight-bar knitting machines, through the functioning of electromagnetic or mechanical means any undue slackness in the thread, any occurrence of abnormal slubs, breakage or absence of thread bring about an angular displacement of a corresponding yarn detector, such motion resulting merely in a uniform substantial displacement of the needle bar in a direction away from the press. However, such considerable displacement of the needle bar frequently gives rise to breakdowns, as during knitting the initial rows of loops of a double welt of hosiery, when the welt bar is in the vicinity of the knitting needles, the loops of the initial courses are liable to slip out of the hooks of the welt bar needles as a result of the aforesaid displacement of the needle bar or it may also happen that the knitting needles are damaged by the hooks of the welt bar needles.

The present invention aims at eliminating the aforesaid drawbacks. Owing to an essentially more simple and convenient arrangement of the stop-motion, the resistance of the mobile elements and of the threads is reduced to a minimum so that the delicate stop-motion device can be used with absolute dependability for the control of particularly fine artificial silk or polyamide threads during knitting of any portion of hosiery. In this way, waste of material and time can be avoided and the production of low-grade hosiery can be prevented. The so-called topping-on and pressing-cit hosiery throughout their width can be dispensed with, and this is particularly advantageous, as such topping-on operations take a much longer time than the re-threading of a broken thread, especially in artificial light.

The main feature of the new device in accordance with the present invention consists in that the displacement of the needle bar out of the range of the presser edge of the sinker head resulting from the change of position of any of the thread detectors or droppers of the stopmotion mechanism of a division is effected by the action of a central control mechanism which responds to different knitting operations employed in producing parts of a knitted article.

Details of the arrangement of the object of the present invention will be clear from the f ollowing description of an embodiment thereof stated by way of example with reference to the accompanying drawings wherein Figs. 1a, 1b, 1c and 1d illustrate an elevational view of the general arrangement of the individual mechanisms according to the invention on a multi-division straight bar knitting machine, as viewed'from the back of the machine, 1

Figs. 2a and 2b a sectional view along the plane 1-1 in Fig. 112 during normal knitting,

Figs. 3a, 3b and 30 a detail A of the stop-motion mechanism as shown in Figs. la-ld provided above a division, including the central control mechanism,-

Fig. 4 a fragmentary plan view of the detail A show in Figs. 3a-3c,

Fig. 5 a detail B of the arrangement of the yarn detector according to Figs. Ba-3c during normal knitting,

Fig. 6 a detail C of. the arrangement of the yarn detector according to Figs.-3a-3c in operativeposition,

Fig. 7 a section of a detail of the stop-motion device and of the central control mechanism along the plane 2-2 in Fig. 3a during normal knitting,

Fig. 8 the same section as in Fig. 7. at a moment of operation of the stop-motion device whilst-the central control mechanism is at rest, i V

Fig. 9 the same section of a detail asin Fig. 7 after the completed operation of the centralcontrolmechanism of the stop-motion device, I a p Fig. 10 a sectional view of a detail of the arrangement of the safety mechanism of the stop-motion device along the plane 3-3 in Fig. 3a during the loop formation,

Fig. 11 a detail fD of the arrangement of the machine stoppage device accordingto Figs. la-ld,

Fig. 12 a side view of the detail D according to Fig.

11 during normal knitting,

Fig. 13 the same side view of detail D asin Fig. 12 at the moment of its operation, I v

Fig. 14 is a side view of the control mechanism of the stop-motion device according to Figs. 3a-3c, V r i Fig. 15 a section of the needle bar release device along the plane 4-4 in Fig. 1d during normal knitting when the needle bar co-operates with the presser edge of the sinker head, t

Fig. 16 a section along the plane 5-5 in Fig. 15,

Fig. 17 the same section as in Fig. 16 but ina position where the displacement of the needle bar out of the range of the presser'edge of the sinker head is effected by the attendant during knitting the double welt,

Fig. 18' the same section as Fig. 15"but at a moment of interruption of the engagementof the press lever pinv slight displacement of the needle bar in a direction away from the presser edge of the sinker head,

Fig. 20 the same section as Fig. 15 at a moment when the needle bar after its slight displacement returns to its normal position wherein it remains merely for knocking-over the loops of a course,

Fig. 21 the same section as Fig. 15 at a moment of a substantial displacement of the needle bar in a direction away from the presser edge of the sinker head.

The automatically operative device illustrated in the drawing is provided according to Figs. la-ld on a multidivision straight-bar knitting machine e. g. on a two-division machine whereof only those elements are shown in the drawings which are in connection with the object of the invention. Figs. 2a and 2b include, as .faras'the usual knitting elements are concerned, only the knitting needles 1 in the needle bar 2, the knocking-over bits 3 and the presser edge 4 of the sinker head 5. Close to Patented Sept. 30, 1958 per assembly 13 and associated yarn carrier 6 up into the hooksof the knitting needles 1. There may be any convenient number of stop-motion mechanisms for each division of the machine.

The stop-motion device 10 (Figs. 6 and 8) of each thread consists of a stationary grid 14 and of a mobile dropper15' supported with its pivot 16 in said grid 14 in such a way as to tend permanently to swing out of the operative position I into the inoperative position II. During the swinging movement of the dropper 15 about the pivot 16, its sidewall 17 (Fig. 8) acts upon a singlearmed disconnecting lever 18 which projects into the path of movement of dropper 15. The operative position I of the dropper 15 is secured by the thread 7 (Fig. 6) which may be easily inserted topwise into a vertical groove 20 of the grid 14 by seizing the extension 19 and turning the dropper 15 into position III shown in Fig. 5. A leaf spring 21 fixed at one end of the grid 14 forms at its other free end an abutment for the dropper 15 in position III, wherefrom the dropper is brought back after the insertion of the thread into theg'roove 20 into a position close to position I. The operation of the dropper 15 in position I is not influenced by the leaf spring 21. A knife 22 which is adjustable in accordance with the thickness of the thread is fixed vertically at the entrance of the thread in the stop-motion mechanism 10 on the grid 14 so that it forms a clearance 23 with the grid 14 wherein any impurities or abnormal slubs occurring in a thread are caught up (Figs. 5 and 6). At the point where the thread leaves the grid, a pin 24 (Fig. 4) is provided about which the thread is guided before its entrance into a thread feeler 25.

The thread feeler 25 (Fig. 5) designed as a doublearm lever is arranged pivotally through a hub 26 on a pivot 27 between the grids 14, 15 and the tension device 11 (Fig. 2a). The straight arm of the thread feeler 25 is provided with an eyelet 28 for the passage of the thread 7 and the curved arm 29 of the thread feeler is able to act upon the respective disconnecting lever 18 (Fig. 8) in a similar way as the dropper 15 by projection of lever 18 into the path of movement of arm 29. A weight 30 adjustable on the curved arm 29 of the thread feeler 25 determines through its position the magnitude of the force necessary for the simultaneous angular displacement of all the levers 18 (Fig. 3b) of a division. Thus, for example, the weight 30 (Figs. 5, 6) with the thinnest thread is in a position close to the pivot 27 whilst with the thickest thread it is in a position at the free end of the curved arm 29. The number of the thread feelers 25 as well as the number of the grids 14, 15 fixed by means of screws on the horizontal wall of a cover 31 (Figs. 3b, 4) corresponds to the number of yarn carriers 6 for a division. The pivots 27 of the thread feelers 25 are fixed with their one end on the inner sidewall of a U-shaped cover 31 (Fig. 7) and with the other end in the lengthwise rim 32 extending parallel to the sidewall of the cover. The position IV of the thread feeler 25 (Fig. 5) during the normal operation is determined by the contact of its longer arm with the edge 33 of a recess 34 on the cover 31 (Fig. 4), the latter being provided above the moistening box 9 and fixed on two horizontal pins 35 (Figs. 2a, 4, 7). The offset end of each pin 35 is fixed in a horizontal angle iron 36 and secured by a nut (Fig. 2a). The angle iron 36 rests on two brackets 37 (Figs. 1a and 1b) of the moistening box 9. On each cover 31 two holders 38 (Figs. 2a, 4) are fixed for carrying two rods 39, for guiding the thread, the thicker rod 39 being provided with horizontally extending apertures 41. The position V of the thread feeler 25 (Fig. 6) is brought about. at an increase of the normal thread tension owing to a defective winding of the bobbin 8 or as a result of the occurrence of an abnormal slub. All the levers 18 of a division corresponding in number to that of the thread feelers 25 and grids 14, 15 are fixed at one end of a horizontally extending rod 42 (Fig. 3b). The one end of the rod 42 is fixedly connected with a double-arm lever 43, the other end with a single-arm disconnecting lever 44. The lever 43 is pivotally supported on a pivot 45 fixed in the vertical wall 46 of the cover 31. The lever 44 is likewise pivotally supported on a pivot 47 fixed in the vertical wall 48 of the cover 31. The top end of the iever 43 is provided with two recesses 49, 50 (Fig. 7) and with a bent extension 51. The bottom end of each of levers 43, 44 extends into an equalizing arm 52 holding during normal knitting all levers 18 of a division in their position as shown in Fig. 7. In one or in the other of the recesses 49, 50 of the lever 43, a tooth S3 of a pawl 54 is engaged, said pawl being pivotally supported on a pivot 55 fixed in the vertical wall 46 of the cover 31. An equal spacing of the lever 43 and of the pawl 54 from the vertical wall 46 of the cover 31 is secured by means of spacing rings 56, wherethrough the pivots 45 and 55 (Fig. 3a) pass. The equalizing arm 57 of the pawl 54 provided with an adjustable weight 58 as well as the equalizing arms 52 of the levers 43, 44 secure the engagement of the tooth 53 of the pawl 54 in one or in the other of the recesses 49, 50 of the lever 43 (Figs. 7, 8). The other arm of the pawl 54 co-operates with the bent arm of the well known release needle 59 of D-shape (Fig. 7) provided at the rim of each division of the machine slidably mounted in a slide member 60 fixed at the free end of a shaft 61 (Fig. 3a). Each needle is arranged jointly for all the stop-motion devices 10 of a machine division. By the bent end of the release needle 59 fitting into the recess 62 (Fig. 7) of the slide member 60, the straight end of the needle 59 is prevented from dropping out of the slide member 60. Clockwise swinging of slide member 60 past the vertical position is prevented by a pin 63 provided in a bracket 64 fixed by means of bolts on an angle iron 36 (Figs. la, lb, 2a, 3a). The shaft 61, provided with a setting ring 65 (Fig. 3a) carries a single-arm lever 66 wherein the one end of a tie rod 68 is suspended by means of a pin 67 (Fig. 2a) The other end of the tie rod 68 is secured by a'pin 69 (Fig. 12) in a single-arm lever 70 fixedly connected to one end of a shaft 71. This shaft is supported in a freely turnable manner both in a bracket 72 of the sidewall 73 and in brackets 74 fixed on spacing rods 75 of the machine.

The lever 70 of a machine stop motion 76 (Fig. 12) cooperates with the pin 77 of a double-arm lever 78 supported pivotally on a pivot 79 of the bracket 72. A socket 80 fixed on the lever 78 carries a mercury switch tube 81 with Welded-in contacts. The cables 82 lead to an electric motor not illustrated in the drawings. Through the pull of a coiled spring 83 secured at one end in a hinge 84 of the bracket 72 and with the other end in an opening of the lever 78, the pin 77 is urged against the bracket 72.

A single-arm lever 85 of the needle bar release device 86 (Fig. l) fixed at the other end of the shaft 71 is pro vided with a notch 87 (Fig. 15), for the flattened end of the pin 88 of a three-arm lever 89, arranged pivotally on a pivot 90 of the bracket 74. A pivot 91 of the lever 89 is engaged in an elongated hole 92 of a double-arm lever 93 supported pivotally on a pivot 94 of the bracket 74. On the bent arm end'of the lever 93 a cam roller 96 is rotatably arranged on a pivot outside the range of an operative segment 97 fixed on a presser cam 98 provided on the main camshaft 99 (Fig. 16). A pin 100 (Fig. 15) fixed on the straight arm end of the lever 93 carries the end of a tie rod 101, the other end of which is secured on a pivot 102 of a hand-operated lever 103 supported pivotally on the machine shaft 104. The position of the cam roller 96 relative to the operative segment 97 is determined by the position of the pin 88 of the lever 89. The engagement of the pin 88 in. the notch 87 of the lever 85 is secured by, a coiled spring 105 suspended with one end in an aperture 106 of the lever 89 and with the other end in a hinge 107 of the bracket 74. A free narrowed end 108 of the! ment 109 a rahged pivotally lever 1116f the needle bar purpose; the abutment cess 112 wherein the pin 113 The lever 111 is arranged pivotally on a is provided needle bar fork 123 and ver 89 is outside on the pivot 110 of the range of an abuta hand 2 (Figs. 16, 17). To this 109 is provided with a wider reof the lever 111 is engaged. pivot 114 of a with three notches 120. On the pivots 121 fixed in brackets 122 of the carrier shaft 120, the needle bar fork 123 is pivotally supported. On a pivot 124 fixed 119 a cam roller 125 circumference of the presser shaft 99. A coiled spring 126 in a lug 127 on the fork 123' and in the free end of the lever is supported so as to ride on the cam 98 of the main camsecured with the one end with the other end in the lever 111 secures the engagement of any of the notches 115, 116, 117 with the pivot 1 18 of the lever 119. On the pivot 28 of the bracket 74 a stop lever 29 is pivotally arranged with 131 of the abutment (Figs. 15, 18, 19, stop lever 129 is determined its bent end 130 extending over the nose 109, whilst lever 129 fits against a set screw the straight end of the 132 of the bracket 74 The respective position of the by a controlling drum 133 fixed stub shaft 134 135. The periphery of the drum 133 comprises a cam projection 136 (Fig.

15) cooperating with a lever a pivot 138. A tie rod 140 mounted on a lever 137 is connected with the pivot 141 of a 137 supported pivotally on pivot 139 of the 3O single-arm lever 142 attached to a shaft 143 freely turnable in the bracket 74. The levers 142, are linked up with the division through a tie 1c) prevent the shaft stop lever rod 145. Setting rings 146 (Fig. from sliding laterally.

144 fixed to the shaft 143 129 of each machine A central control mechanism 147 for all divisions of the machine is operated by the projection of any release needle 59 of a division out of through the respective needle bar release device 86 of the machine stop motion 76,

the slide member 60 (Fig.10) the disconnecting and This cam 148 bolted to a chain sprocket 149 (Fig. 30) presents a lower and a higher circumference as can sprocket through a link chain not illus a chain sprocket of the same shaft 99. On the circumferen wheel 149 keyed on a shaft 150 is steadily driven be seen in Fig. 14. The

trated in the drawings from size fixed on the main camce of a cam 148 rides a cam roller 151 supported rotatably on the pivot 152 of a single-arm lever 153. on a pivot 154 fixed 155 (Fig. 30) attached with on the lever 153 and with the on the sidewall 135 provides the cam roller 151 with the The lever 153 is pivotally supported in the sidewall 135. A coiled spring one end to an anchor 156 other end to an anchor 157 for a permanent contact of circumference of the cam 148. The tie rod 159 pivotally connected at one end at 158 to the lever 153 is other end at 160 to a pivotally connected at the lever 161 fixed at the end of a shaft 162 supported rotatably in the bracket 37 of the moistening box 9 and the angle iron 36 (Figs. lb,

the other end of the shaft 162 is in the holder 163 fixed on 7). A lever 164 fixed at connected through a link 165 with a lever 166 on a shaft 167 of the bracket 64.

An abutment segment 168 erates with the straight 8, 9).

A securing mechanism 16 necting levers 18, 43, 44 con end of sion of a double-arm securing lever 170 supported pivotally on a pivot 171 of the like arm end 172 of the lever fixed on the shaft 167 coopthe release needle 59 (Figs.

9 (Fig. 10) of the disconsists for each machine divibracket 64. One wing- 170 cooperates with the bent extension 51 of the lever 43. On the other arm end of the lever 17 0 fits the round her 173 supported slidably in ed-off end of a pusher memthe bracket 64. I The other thicker end of the pusher member 173 rides under the pressure of a coiled spring 174 on the circumference of a driver 175 fixed on the shaft 167 of the bracket 64. Instead of the pusher member 173 the free end of an L- shaped securing member 176 fixed to the slide member 60 of the release needle 59 can fit against both the arm of the securing lever and the arm of the pawl 54 (Fig. 9).

The above described devices operate as follows:

During normal knitting of hosiery when each individual thread 7 is unwound through the reciprocating motion of the respective yarn carrier 6 (Fig. 26) over the head of the bobbin 8 and is guided with the help of the respective stop motion mechanism 10, a tensioning device 11, ring 12 and snapper assembly 13 into the knitting needles 2, the dropper 15 and the grid 14 are l in Figs. 5 and 6). The thread feeler 25 through the eyelet 28 of which passes the thread is in its position IV as shown in Fig. 5. The bent arm 29 of the thread feeler 25 is outside the range of the lever 18 which is in the position shown in Fig. 7, so that the arm 52 of the lever 43 and the arm 57 of the pawl 54 retain the tooth 53 of the pawl 54 in engagement with the top notch 49 of the lever 43. The bent arm of the release needle 59 rests against the bottom of recess 62 of the slide member 60 fitting against the pin 63 in its position shown in Fig. 7,

straight end of the needle 59 remains hidden inside the slide member 60. Likewise the free end of the securing member 176 for the levers 18, 43, 44 is outside the range of the arms of the pawl 54 and of the securing lever 170 which through the action of the pusher member 173 and pivotal driver assumes the position shown in Fig. 7 during the sinking of each loop course. The reciprocating pivotal movement of the driver 175 and segment 168 of the central control mechanism 147 taking place after the completion of the sinking of each loop course in a direction towards, and away from, the slide member 60, is derived from the cam 148 (Figs. 1d, 3c, 14). During the sinking of each loop course, when the cam roller 151 of the lever 153 is riding inoperatively on the surface of the lower circumference of the cam 148 to the extent of a semi-circle, the segment 168 and the driver 175 remain in their position shown in completion of the sinking operatio as soon as the yarn carrier 6 attains its extreme position alongside the needle bar 2, the cam roller 151 moves from the surface of the lower up to the higher semi-circular circumference of the cam 148 thus causing a pivotal movement of the segment 168 and driver 175 towards the needle 59 to the position shown in Fig. 10. In this operation, the higher semi-circular circumference of the cam 148 corresponds to that time which is necessary for the formation of a loop course. At the same time the pusher member 173 rides down from the higher to the lower circumference of the driver 175 thus releasing the securing lever 170. The wing 172 of the lever 170 falls behind the bent extension 51 of the lever 43 so that during the formation of each loop course, when no thread feed into the needles takes place, the lever 43 remains inoperative. After the completion of a course, when another sinking operation and consequently a new' thread feed into the needles is taking place, the cam roller 151 rides off the higher down to the lower circumference of the cam 148 whereby the segment 168 is moved in a direction away from the needle 59 back to the position shown in Fig. 7. Simultaneously the pusher member, 173 slides from the lower up to the higher circumference of the driver 175 so as to press against the arm of the securing lever 170. The wing 172 of the lever 170 is brought into a position outside the range of the lever extension 51 as shown in Fig. 7 so that the operation of the lever 43 is not impeded during the thread feed into the needles.

As a result of the inoperative position of the slide member 60 as shown in Fig. 7 as Well asthat of the shaft interengaged (position Figs. 7 and 8. After the I lgVBg 66 agd tie rod 68 (Fig. 3a), the lever 70 (Fig.

Xe on t e shaft 71 is outside the ran e of the 77 7 I g pin into the position shown in F1 19.

acfigjigf L.) of the double-arm lever 78. Through the the coiled spring 105 the pin 88 of t lig i a'ctlon of o a coiled spring 83 the pin 77 fits against the of the er ndes out bracket 12 so that the mercury switch tube 8 is position shown in Fig. 12 To the aforesaid D pC-SIUOII 15 into the positionshown in F1 18. 1o tfithe slide member 60 or switch tube 81 as shown in the lever 89 actsupon the abutni1t109 it and 108 of i 12 corresponds the position of the lever Fbe lever 111 n 85 as shown and causes a i Position the recess 37 of the lever 35 th th to l i tgii t ge f p 8 0f the three-arm lever 89 in such a way 0 meat of the nose 131 of the abutment 109 with the bent ree n art-owed end 108 of the lever 559'is underend 130 of the lever 129. A a ult of suc neath the abutment109 of the hand lever 111 of the mahltaihed during the lowering movement of the needle needle bar 2, the pivot 91 of the lever 89 moving th bar and ofthe simultaneous disengagement of the pivot cam roller 96 of the lever 93 away from the operative 113 f the notch 115 as Shown in 18, whereupon segment 97. The en a 1 remains in gliding motion of the cam roller 125 on the circumference the needlefiar 2 from its P P VI shown in ller 125 of the lever 119 along tion of the needle bar. riding motion of the cam ro During knitting f h initial Courses f loops and 20 the higher circumference of the press cam 98 causes an 9 inoperative angular of the pivot 118 of the press r 18 the On an increase of the normal thread tension resulting from a defective Winding of the bobbin 8, an impurity or from an abnormal slub caught up within the clearance 23 of the adjustable knife 22 which might result in a close to the presser edge 4 of the sinker head 5. In view 13 and brings all the levers 18 of a machine division from their position shown in Fig. 7 into the position shown in Fig. 8. As a result of such displacement of the levers 18, both levers 43 and 44 are brought from their position the top recess 49 into the bottom recess 50 of the lever 9 the end 103 f the 43, thus bringing about a displacement of the pawl 54 109 f the lever 111 The pivot 1 from the position shown in Fig. 8 as well as a lifting of l 119 returns h h h motion f h cam roller release needle 59 and Shifting of its Straight 611d out 125 along the lower circumference of the press cam 98 f the slide member By the segment 168 being swims from the position shown in Fig. 19 to the position shown in the dl'ffich'oll 0f the KNOW at Bach COIIIPIC- in Fig. 18. Through the action of the coiled spring 126 tion of sinking a loop course through the cam roller 151 the pivot 118 of the lever 119 s brought into engagement moving from the lower circumference up to the hi hei with the notch 115 of the lever 111 so that the needle circumference of the cam 148, the slide memoer 60 is bar 2 returns during the formation of a loop course into likewise swun" trom the position shown in Fig. 8 to the the normal position VI shown in Figs 15 or 20, wherein position shown in Fig. 9 by the se' rnent 168 movin on the descending knitting needles are forming loops, withto the projecting end of the needle 59 The needle 59 out giving rise to the possibility of the loops getting torn is lowered by gravity down to a point, where its bent through the influence of the curved back of the knockend rests against the bottom of recess 62 or the slide over-bits3 During knitting of the following loop courses, member 60 The free end of the securin member 1'76 e cam roller 96 ridesdown from the circumference of instead of the pushing member 173, which on the driver the segment 97 and the coiled spring 105 causes a new 175 being swung in a direction towards the needle 59, turning of the levers 89, 111 and a slight displacement of rides down from the higher to the lower circumference th n dle ar 2 into th position VII shown in Fig. 19 at of the driver. 175, holds the securing lever 17E) in its orig- 60 Which the machine is brought to a Stop. inal position shown in Fig. 9, wherein the wing 172 of The turning of the levers 93 from the Position Shown the lever 170 is outside the range of the extension 51, as in 21 into the Positloh Shown in 15 Whereotherwise after displacement of the lever 43 into the posiin the P 83 0f the lever 89 is again ihtfochlcfid into the tion shown in Fig. 8, the wing 172 of the lever 170 would 11308855870: 35, is brought about y the attendant be unable to engage behind the extension 51 of the lever by selling ahd'hfhhg the hand level 103 ahOht the m n shaft 104. Turning of the levers 70, 85 and of the shafts The angular displacement of the slide member from 61, 71 causes the slide f f 60 and heed1e 59 to fh its position shown in Fig. 8 into the position shown in Fig. from h P01tl0I1 hOWn m Fig. 9 to the previous position and tie rod 63 to the shaft 71. The angularly displacing lever causes the pin 77 to be lifted and the lever 78 60116? spflhg lever 78 is turned into the previous Turning of the shaft 71 results inturning the lever 85 the'arins52, 57 causes; the pawl 5,4;levers 18,43, 44 as 

